Valve-gear for steam-engines



(No Model.) 2 Sheets-Sheet 1.

A. KENDALL VALVE GEAR POR STEAM ENGINES.

No. 269,678, Patented Dveo.26,1882.

. s @isf-1 J im A? #ffii (No Model.) 2 Sheets-Sheet 2.

A. KBNDALL.

VALVE GEAE EOE STEAM ENGINES.

NO 269678. Patented DeopZ, 1882.

l: Wzlzfzasses L N. PETERS, Mmc-Lithograph", Walhlngmn, D. C,

' PATENT OFFICE.

ADQNIRAH KENDALL, OF ERIE, PENNSYLVANIA.

VALVEf-GEAR FOR vsTEAivi-ENGINes.

Y SPECIFICATION forming part of Letters Patent No. 269,678, datedtDecember 26, 1862.

Application filed February 223, 1832.

(No model.)

To all whom it may concern:

Beit known that I, ADONIRAM KENDALL, a citizen ot' the United States, and a residentot' Erie, in the county of Erie and State ot' Pennsylvania, have invented a new and useful Im-A provement in Valve-Gear for Steam-Engines; and I do hereby declare thatthefollowingis a full, clear, and exact description thereof, reference being had to the accompanying drawings, and the letters 0r figures of reference marked thereon.

My invention relates to the construction of 4that class of steam-engine governors which` are attached toandrevolv with the main shaft of the engine and operate directly upon the eccentric and move it diametrically across the shaft.

My invention consists in providing' a new and improved construction and arrangement of the parts which operate upon and move the eccentric.

l My device is illustrated in the accompanying drawings as follows:

Figure l is a perspective view. Fig. 2 is a direct side view. Figs. 3 and 4 show details of construction.

is The construction of my device is as follows:

A is the rim of the frame A', the two forming a band-wheel, which maybe used for the driving-pulley. The form of the frame A', which is the web or spider of the pulley, is such as will best laccommodate the mechanism by which the eccentric is moved.

C is the main shaft ot' the engine.

I) is the eccentric of the engine, and is provided with a slot, d, so that it can move diametrically on the shaft.

All the above parts are common in governors of this class.

Connected to or ca'st solid with the eccentric are arms E E,L by which themmechanism which moves the eccentricis connected thereto.

B B are the weights, which move by the centrifugal force generated by the rotation of the device.

B' B' are the arms or levers to which the weights are attached. The arms B and the Weights B are cast in one piece, preferably. These arms are pivoted at b to the frame A', and their ends are connected by rods B2 with toggles G, which operate upon the eccentric, and therefore as the weights are thrown out or in by the motion of the main shaft the toggles Gr are moved. These toggles are pivoted at one end to lugs g q on the rim A and at the other end to the arms E E ofthe eccentric at g g.

F F are springs, which resist the centrifugal movement ot' the weights and dra-w them in toward the center when the momentum of the engine diminishes. These springs have their fixed hearings on the frame A', and their movable bearings are ofcourse on the arms B'.

H H are suspending-rods, on which the eccentric is mounted. They are pivoted at one end to the rim A and at the other end to the arms E of the eccentric, and as they are. ot' the same length and their positions are identical at each side ot' the eccentric they will permit the eccentric to move around the shaft sufficiently to give the valve the proper lead, and also compel it to move nearly in a straight line diametrically across the shalt to reverse the movement of the valve. Pina jj, which extend from the eccentric through slots J J in the frame A', are provided with heads on the opposite side of the frame, and thus serve to gibthe eccentric, so as to prevent lateral inotion. This gibbing may, however, be done at the point where the rods H H are connected with the eccentric-arms.

The weigh ts are provided on their outer sides with recesses a', which receive lugs a on the rim A, and thereby lateral movement of the Weights is prevented. (See Figa?) for detail of this construction.)

The springs F are mounted on telescoping spools formed of the partsff'. (See Fig. 4.) lo insert the springs they are compressed, and a pin,f2, is passed through holes in the parts ff' ot' the spool, and thus fixed they can be vput in place and the pin then be removed.

The operation of my governor as such is precisely the same as others of its class or kindviz., as the momentum varies the position ot' the weights changes, and they by their connections change the position ot' the eccentric dia- "metrically upon the shaft, and thereby vary the cut of the engine.

Individually the operation of my governor is IOO as follows: The position of parts shown in the drawings is that which they occupy whenthe weights are thrown ont so far as to bring the eccentric to the central point, and thereby give the valve uo movement. This position is attained only when the engine is running at full speed. Any diminution of this speed, which of course must follow at once, will cause the weights to drop toward the center, because the lessening ofthe centrifugal force will allow the springs F F to assert themselves. This inward movementofthe weights will change the positions ot' the toggles, and that will move the eccentric. On the arms'E of the eccentric are two places for connecting the toggles-viz,g' and g2. 3y changing the toggles to g2 and pntting the long rod B2 where the short rod B2 now is and the short oney where thclong oneis the governor will lic fitted for an engine rutr ning in the opposite diri ction from the one for which it is now fitted-that is to say, by making the changes indicated, or the reverse, the governor is changed from right to left, or the reverse.

What I claim as new is- 1. In a steam-engine gcvernor wherein the position of the eccentric is changed by the movement of the weights, the combination, with said eccentric and weights, of the le\ers B' B', rods B2 B2, and toggles G G, substatitially as and for the purposes set forth.

2. In a steam-engine governor wherein the position of the eccentric is changed b v thc centrifugal movement ot" weights, the combination, with said eccentric and weights, of' the arms B' B', rods B2 B2, toggles Gr G, and springs F F, substantially as shown.

In a steam-engine governor wherein the position of the eccentric is changed nearly diametrically across the shaft, the combination, with said eccentric, of the hanger-rolls H Il, whereby1 a reversing motion and the lead is given to the valve, constructed substantially shown, and arranged to operate fox` the putposes mentioned.

4. In a steam-engine governor wherein the eccentric is moved diametrically across the shaft by the centrifugal movement of weights, the combination, with said eccentric and said weights, of the levers B' B', rods 32 B2, togglcs G G, and hanger-rods I-I II, substantially as and for the purposes mentioned.

5. In a steam-engine governor wherein the eccentric is moved diametrically upon the shalt by the centrifugal movement of weights, thc combination, with said eccentric and weights, of the hanger rods IiI II, attached by one end to the rim and by the other to the movable eccentric or plate., ot` the trame A' and rim A, provided with means, substantially as shown, for gibbing the said eccentric and weights, so as to prevent lateral movement ofthe same.

6. In a steamenginc governor wherein the eccentric is moved by the centrifugal action of weights, the combination, with said weights, ot' spiral springs F br'connteracting the said weights, which springs are mounted on telescoping spools iormed ot' the partsff', slibstantially as and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 20th day of February, 1882.

ADONIRAM KENDALL.

'itnesses:

JNO. K. HALLocir, RoBT. H. PORTER. 

